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re-glazing a used plate? - danger of explosion

updated wed 21 apr 04

 

Paul Lewing on mon 19 apr 04


on 4/19/04 10:40 AM, Vince Pitelka at vpitelka@DTCCOM.NET wrote:

>> That would be excessively cautious. Just keeping the piece in a warm dry
>> place for a day or so should do it.
>
> Paul -
> Are you really sure of this? Maybe I am being overly cautious, but I have
> seen several rather spectacular explosions of work being refired after being
> in use for some time. I would want to make absolutely sure that the piece
> was completely free of impacted moisture, and I do not think that leaving it
> in a warm dry place for a day or so will do it. I would preheat it
> overnight at 150 to 200 degrees in an electric kiln before putting it in the
> glaze firing.

OK, Vince, you could be right. It might need more than a day or so in a
warm place, if it had been really soaked. But I still think Roger's
suggestion of a week at 180 degrees would be overkill.
Paul Lewing, Seattle

Vince Pitelka on mon 19 apr 04


> That would be excessively cautious. Just keeping the piece in a warm dry
> place for a day or so should do it.

Paul -
Are you really sure of this? Maybe I am being overly cautious, but I have
seen several rather spectacular explosions of work being refired after being
in use for some time. I would want to make absolutely sure that the piece
was completely free of impacted moisture, and I do not think that leaving it
in a warm dry place for a day or so will do it. I would preheat it
overnight at 150 to 200 degrees in an electric kiln before putting it in the
glaze firing.
Best wishes -
- Vince

Vince Pitelka
Appalachian Center for Craft, Tennessee Technological University
Smithville TN 37166, 615/597-6801 x111
vpitelka@dtccom.net, wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka/
http://www.tntech.edu/craftcenter/